Discoloration refers to a change in the color of an object, material, or surface. This change can occur due to various factors, including exposure to sunlight, chemical reactions, or aging. For example, fabrics may fade when exposed to sunlight, while metals can tarnish due to oxidation. In the context of health, discoloration can also describe changes in skin color, which may indicate underlying conditions. For instance, bruises appear as dark spots on the skin due to blood pooling under the surface. Monitoring discoloration can be important for identifying potential health issues or damage to materials.